20世纪30年代，龙蛇混杂，暗潮涌动的上海滩，各方势力缠斗角力，局势动荡不安。法租界内国民党高级爱国将领杨鼎被人杀害，一时间在社会上引起巨大震动，民间强烈呼吁追查凶手。爱国警官方召（孔祥玉 饰）受命前往现场调查，谁知期间却遭到警察局长丘尔康的百般阻挠，丘更在调查途中设下圈套加以陷害。丘妄图将责任推到中国共产党的身上，然而方召绝不肯就此罢休。经过不懈的侦查，他终于逼近了事件的真相，危机时刻更得到失散多年的妹妹方卉的救助。 　　家国大义当前，忠义赤子面临重大的挑战和选择……

Ma Lan (Qin Yi), who was born in the city, was unwilling to be a mediocre housewife and determined to take part in the surging socialist construction. Her parents did not agree with her plans, but she resolutely goes to the construction site. There others look at her strangely, but Ma Lan does not care. The master Hu Agen looks down on women, dismissing Ma Lan, who decides to learn to drive a loader. Even in secret if she must.

Ma Lan (Qin Yi), who was born in the city, was unwilling to be a mediocre housewife and determined to take part in the surging socialist construction. Her parents did not agree with her plans, but she resolutely goes to the construction site. There others look at her strangely, but Ma Lan does not care. The master Hu Agen looks down on women, dismissing Ma Lan, who decides to learn to drive a loader. Even in secret if she must.

五十年代的北方某地，境外间谍机关委派女特务李文英（白玫 饰）潜入我东北地区，企图组织敌特空投。此时正值全国镇反运动期间，李的行动处处碰壁。正在此时，我侦察员冯广发（王心刚 饰）假借生意亏本而结识了李文英，经过几次试探和考验，冯取得李的信任。李委派他去香港和上司孙威廉（浦克 饰）接头，老奸巨猾的孙对冯仍心存疑虑，布下各种刁难考验冯，冯心地坦然且不露破绽，终蠃孙的信任。美国间谍皮斯利（车轩 饰）却仍对冯的真实身份有怀疑，他用美国所谓的“心理测谎器”对冯进行强大的心理攻势，冯最终经受住了考验。疑心未消的敌人在几天后的一个夜晚，假借送其潜回大陆，在船上演出了一套“苦肉计”，又被冯识破。从此，敌人黔驴技穷，彻底相信了冯广发，并委以重任......

Set in the People's Republic of China during the 1990s, the film centers on a 13-year-old substitute teacher, Wei Minzhi, in the Chinese countryside. Called in to substitute for a village teacher for one month, Wei is told not to lose any students.